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Ryegrass Limited Purpose Landfill and Balefill Closed Landfill <br />Groundwater and Leachate Sampling and Analysis Plan <br />Kittitas County Solid Waste <br />8. Collect samples using dedicated discharge hose directly into pre -labeled sample containers <br />at a flow rate between 200 and 300 ml/min. All sample containers should be filled with <br />minimal turbulence by allowing the groundwater to flow from the tubing gently down the <br />inside of the container. VOC samples should be collected so that no headspace exists to <br />prevent air from remaining in the bottle; after capping, invert and tap the container to ensure <br />no air bubbles are present. Field -filter samples to be tested for dissolved metals through a <br />0.45-micron membrane filter immediately before filling sample containers. <br />9. Close and lock well. <br />10. Dispose of purge water on the ground surface. <br />11.After purging is complete, begin sample collection. When a pump is used for sampling, <br />operate with as little fluctuation in pumping rates as possible to minimize turbulence and <br />aeration of the pump effluent. Samples will be collected in the following order to minimize <br />volatilization: <br />2. volatiles <br />3. TPH <br />4. inorganics <br />5. metals <br />12. Fill sample containers for volatile samples so that no headspace exists. After capping, invert <br />the container and tap to verify that no air bubbles are present. For parameters other than <br />volatile organic compounds, fill the sample container to within 2-5 cm of the top, in a manner <br />to minimize aeration. When sampling for dissolved metals, filter the sample using a <br />peristaltic pump and in -line disposable 0.45-micron filter. <br />13. Label all sample containers at the time of sampling. Sample labels will include the following <br />information: <br />■ Project name and number <br />■ Sample station <br />■ Sample number <br />■ Date and time of sample collection <br />■ Sampler's initials <br />■ Analyses requested <br />14. Store all samples at approximately 4° C for transport to the laboratory under chain -of -custody <br />procedures. Samples that will be analyzed for volatile organic compounds will not be placed <br />in direct contact with ice. Upon completion of sampling, the well will be locked and secured. <br />Decontamination <br />During field sampling, all equipment surfaces placed in well or in contact with groundwater samples <br />will be cleaned before purging and sampling the next well. HDPE sheeting will be placed around the <br />well -head to keep work area clean. The equipment will be cleaned using the method described in the <br />"Standard Operating Procedure Decontamination". <br />April 2024 1553-1763-010 B-4 <br />